Ross Lake

Ross Lake

Rockport, Whatcom County, WA
18mi²
500.00ft
Directions
Lake Information

Ross Lake is a large reservoir in the North Cascade mountains of northern Washington state, United States, and southwestern British Columbia, Canada. The lake runs approximately north-south, is 23 miles (37 km) long, up to 1.5 miles (2.5 km) wide, and the full reservoir elevation is 1,604 feet above sea level (489 m). The U.S. portion of Ross Lake is in the Ross Lake National Recreation Area. North Cascades National Park is adjacent to the west and south, while the Pasayten Wilderness is east of the lake. In British Columbia the lake is a part of Skagit Valley Provincial Park, and Manning Provincial Park is nearby to the east.

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Current Conditions

56°F°
Feels like 49°F°
Cloudy
Today's High
53°F°
Today's Low
33°F°

Water Temperature

51°F
Updated: (May 7)
Sign in to contribute temps.

Current water temperature for Ross Lake is 51°F.

Current Snapshot

Wind7 mph WSW (Gust 18 mph)
Pressure
29.90 inHg
Visibility12 mi
Humidity54%
Cloud Cover96%

Forecast: Thursday, May 8

Day 1 of 9

Hourly Insights

7 AM
34°F°
10 AM
41°F°
1 PM
49°F°
4 PM
53°F°

Temperature

High
53°F°
Low
33°F°

Precipitation

Chance5%
Amount0.00"
Typerain

Wind

2mph
Avg Speed
Gusts up to
19mph
CalmModerateStrong
Max Speed7 mph

Sun, Moon & UV

Sunrise12:32 PM
Sunset3:30 AM
Moon PhasewaxingGibbous
Max UV Index5 (Moderate)

Solunar Fishing Forecast

Action Rating
2/5

Todays action is rated a 2 (scale is 0 thru 5, 5 is the best)

Major Times (Best)

7:00 AM - 7:00 AM

12:30 PM - 3:00 PM

Minor Times (Good)

11:15 PM - 12:45 AM

10:28 AM - 11:58 AM

Outlook for Thursday at Ross Lake

Expect temperatures ranging from 33°F to 53°F. Skies look partly cloudy with little chance of precipitation. Winds will be averaging 2 mph, with potential gusts reaching up to 19 mph. The maximum UV index will be 5 (Moderate), so plan sun protection accordingly. For anglers, today's fishing action is rated 2/5 (Todays action is rated a 2 (scale is 0 thru 5, 5 is the best)). Look for the best bite times during the major periods around 7:00 AM and 12:30 PM, or try the minor windows near 11:15 PM and 10:28 AM for potential early morning or evening action. Check back for the latest conditions and forecasts for Ross Lake.

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May 8th 2025

Lake Information

Elevation
500 ft
Area
18 mi²
Coordinates
48.738, -121.050

Weather Forecast

Thursday

53°F
33°F

Friday

59°F
39°F

Saturday

51°F
40°F

Sunday

50°F
38°F

Monday

46°F
38°F

Tuesday

52°F
39°F

Wednesday

48°F
41°F

Thursday

52°F
39°F

Friday

45°F
39°F
Thursday - 5/8/2025
53°F
33°F
12am
39°F
51°F
30.09 hPa
7 mph
W
G: 16 mph
2am
36°F
51°F
30.16 hPa
6 mph
WSW
G: 19 mph
4am
35°F
51°F
30.21 hPa
4 mph
W
G: 14 mph
6am
33°F
51°F
30.27 hPa
3 mph
WSW
G: 9 mph
8am
36°F
51°F
30.30 hPa
0 mph
W
G: 1 mph
10am
41°F
51°F
30.31 hPa
0 mph
NE
G: 1 mph
12pm
46°F
51°F
30.28 hPa
0 mph
NNE
G: 1 mph
2pm
51°F
51°F
30.23 hPa
2 mph
WSW
G: 5 mph
4pm
53°F
51°F
30.20 hPa
3 mph
WSW
G: 6 mph
6pm
50°F
51°F
30.21 hPa
3 mph
WSW
G: 7 mph
8pm
47°F
51°F
30.20 hPa
2 mph
WSW
G: 4 mph
10pm
43°F
51°F
30.22 hPa
1 mph
SW
G: 2 mph

Water Temperature History

Trends for Ross Lake

Current Temp

Sign in to view

Latest recorded surface temperature.

Lowest in Period

32°F

On Mar 23

Coldest point in the Last 12 Months.

Average in Period

46°F

Typical temp during the Last 12 Months.

Temperature Trend: Last 12 Months

Surface temperature over the selected period.

Key Observations (Last 12 Months)

  • Warmest avg: July (69°F).
  • Coolest avg: March (36°F).
  • Rapid warming often occurs: June → July (+14°F).
  • Sharpest cooling trend: September → October (-8°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

Wind Direction

261°

Pressure

1019 mb

Cloud Cover

51%

Visibility

12 miles

Daily Pressure Forecast

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Frequently Asked Questions About Ross Lake

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